Search Posts:

IBM 4956 Series I System

SHARE

Return to Threads

  IBM 4956 Series I System by Bill Degnan - 05/18/2005 11:02
5-18-2005

I have an IBM 4956 Series I System as described below (circa 1976-83). I have limited
experience with this era IBM and will gladly except assistance in the mean time I will slowly work to restore its function. I was told that it was operational when taken off line 20 years ago and appears to have been stored adequately. Assembled the system is
housed in two 6-foot rack cabinets with a total weight of 600-800lbs If you want it you will have to come to the Landenberg, PA USA which is on the extreme south-eastern tip of the state, about 10 miles from I-95 where Maryland meets Delaware. Bring a truck.

I can provide pictures or additional details upon request.

Inventory:
qty) description
2) 6' IBM 4997 Rack Units with shelves to house the processor and peripherals.
1) IBM 4956 Processor (see http://www.btxmuseum.de/Hardware/geraet.asp?id=120 for German
equivalent pic of control panel) See also below.
1) Cambex Corp Model 80810 2-tape drive storage device (no tapes)
1) IBM 4962 8" disk drive (w/ 3 boxes of software)
1) IBM 4967 Hard drive (69kg)
1) IBM 4963 Hard drive (55kg)
1) IBM 4963A Hard drive (55kg)
1) IBM 4978 display station and keyboard. Not confident in display, unsure how to test.
12) Series I system software/hardware manuals "standard 3-ring binder sized"
20) Series I system software/hardware manuals (tall, blue, with IBM written on them)
There is documentation for all components, plus service logs, software documentation, installation instructions, etc. Pretty complete.

Misc. papers and other documentation and receipts.

3 boxes of IBM software on 8" disks, including diagnostics for hardware.
1 box of cables and jacks for additional display stations/terminals
1 box of printer ribbons (no printer)

product literature and period IBM sales circulars, etc.

* The 4956 Processor is full of the appropriate cards for the peripherals (hard drives,
tape drive, terminals, etc.) The system appears to have been upgraded at least once. I
have been able to cable up most peripherals to the matching processor cards. I do not
plan to power up the system at this time. I have cleaned each subsystem, but overall it
was "clean enough" already. Most of the wear is on the rack unit, dings and the like.

Overall condition is OK. Some dust removed.

Email billdeg at aol dot com.



Reply
  IBM Series 1 Project Update by Bill Degnan - 01/07/2008 22:37
Click here to see pictures of the IBM Series 1 in its new home. Most important I have the proper power to complete the restoration process.

Pictures

Reply
  Booting an IBM 4956 by Bill Degnan - 05/03/2008 10:04
I have power now, and I have turned on the main CPU and disk drive. Booting an IBM 4956 with 4978 monitor and 4962 drive unit (Series 1 / Series I core unit)

I am starting to imagine ways to use the 4956 as a super expensive weak personal computer.

Currently the unit is not cabled up, but I have a pretty good idea of what goes where. But that can be dangerous. Better find out for sure.

NEXT: Learn more about the 4962 - is the hard drive parked? how do you cable the drive to the controller card, which is the correct controller card? Does the unit boot without a boot disk in the drive and look to the hard drive (like a PC) for the OS? What are drives called. I may have a BASIC disk somewhere intended for this computer, hmmm....

I do know what this system was used for originally. A medical records database system. The system used a modem to transmit info. It could have run a small computer department, there are a lot of serial cables. It would be fun to turn this into something else, after I have explored and documented how it was originally used.

See thread on vintage-computer.com

http://www.vintage-compu.../showthread.php?p=62500


Reply
  Cabling 4956 to a 4962 Mod 4 drive unit by Bill Degnan - 05/30/2008 21:55
Cabling 4956 to a 4962 Mod 4 drive unit

There are 5 ribbon cables. Four for the hard drive and 1 for the disk drive.

I believe I have the correct cabling, based on the manuals.

I was not able to find any references to unparking the hard drive, so I will assume that this is not necessary.

I powered on the system with the 4978 display station.

Not much happened other than everything powering on and some lights.

I seek advice.

Reply
  Hi-res pictures by Bill Degnan - 04/18/2009 09:38
I have re-started this project with the help of Paul Shlichting out in California. He has Series 1 experience and offered to help walk through the restart process remotely. I took and posted some new hi-res pictures that we will use to verify that the cabling is correct and for removal of the hard drive parking plate(s).

New Hi-res photos

Reply

Resources:


Buy a Commodore Computer Poster

Popular Topics and FAQs


  • Commodore B Series Tips and Tricks
  • Aerocomp TRS 80 M 1 Expansion Unit DDC
  • Items Wanted
  • Lobo Max 80
  • Zenith Z-19-CN
  • Prototype PET 2001 photo
  • Using Toggle Switches to Analyze Memory
  • Commodore Disk Archive Project
  • PET 2001 Prototype at Gametronics 1977
  • Jim Butterfield Photo
  • IMSAI 8080 With Processor Tech. Cutter
  • Secrecy is the keystone of all tyranny
  • Cromemco System Three
  • Northstar Horizon - Boot Problem
  • Computer History and Restoration Links
  • Commodore BX-256-80 - 8088 Co-processor
  • S-100 board testing with Z-80 ICE
  • Donner 3500 - an early portable computer
  • Digital (DEC) PDP 11/05 NC Assembly
  • Univac 1219 rescue
  • IMSAI 1.4 BASIC vs. MITS 8K BASIC
  • Fido BBS listing node list 6-13-1986
  • PDP 8e
  • MITS 88-2 SIO (2SIO) for BASIC
  • Visual Technology Inc Model 1050
  • Amiga 2500 Restoration
  • The Evolution Of IBM Computers
  • Replacement teletype print hammer head
  • Archiving and Copying Software 101
  • Computers Built 1940 - 1950
  • CBM B-520 (a.k.a B256-80 or B500 256)
  • RCA COSMAC Microkit
  • Commodore 64K C-116 Mods
  • MITS 8800b Turnmon 9600 baud
  • Catweasel, 8in and 5 1/4
  • Raspberry Pi as Gateway to Internet
  • Digital PDP11 late 1969 early 1970
  • PDP 11/40 72 inch cabinet model
  • PDP 11/40 Industrial 11 model
  • Digitial MicroVAX 3100 30 System
  • Digital VAX 4000-200
  • Commodore 64 / 1541 DRIVEKNOCK
  • Booting the System Using RL02 drive
  • PACS: Reflections by Kathleen Mauchly
  • Tele-Graphic Computer Systems Inc.
  • Commodore B Series SID Jukebox?
  • Installing Core into PDP 11/40
  • Setting Up OpenVMS 7.1 DNS CLERK
  • Felt-Tarrant Comptometer Model J
  • NextStation Color
  • Digital Rainbow (PC100-B2)
  • 1970 Compusad Compulogical Tutor
  • Archiving Papertapes Using DSI NC 2400
  • 1976 P.C.C. Features the MAI JOLT 6502
  • 1961 Beckman DEXTIR Computer
  • UNIVAC 1 and UNIVAC File Computer 1
  • Past Issues:


    Corp Mod G400 pic3

    This image was selected at random from the archive. Click image for more photos and files from this set.